Información Técnica Chromalox Technical Documents Datos de referencia Propiedades del aire Calor específico, viscosidad y densidad (peso) del aire a diferentes temperaturas y presiones Temp Calor Viscosidad del específ- absoluta Aire ico (Btu/ (Lbs/ (°F) Lbs/°F) Ft/Hr) -20 -10 0 10 20 30 40 50 60 70 80 90 100 120 150 175 200 250 300 350 400 500 600 700 800 900 1000 0.239 0.239 0.239 0.239 0.239 0.240 0.240 0.240 0.240 0.240 0.240 0.240 0.240 0.240 0.241 0.241 0.241 0.242 0.243 0.244 0.245 0.248 0.25 0.254 0.257 0.259 0.262 0.039 0.039 0.040 0.040 0.041 0.041 0.042 0.042 0.043 0.044 0.045 0.045 0.046 0.047 0.049 0.051 0.052 0.055 0.058 0.060 0.063 0.067 0.072 0.076 0.080 0.085 0.089 Presión indicada en lbs/plg2 (basado en presión atmosférica absoluta de 14.7 lbs/plg2 al nivel del mar) 0 10 20 0.0900 0.0882 0.0864 0.0846 0.0828 0.0811 0.0795 0.0780 0.0764 0.0750 0.0736 0.0723 0.0710 0.0686 0.0652 0.0626 0.0603 0.0560 0.0523 0.0491 0.0463 0.0414 0.0376 0.0341 0.0314 0.0295 0.0275 0.152 0.149 0.146 0.143 0.140 0.137 0.134 0.131 0.128 0.126 0.124 0.122 0.120 0.116 0.110 0.105 0.101 0.094 0.088 0.083 0.078 0.067 0.063 0.058 0.053 0.049 0.046 0.213 0.209 0.204 0.199 0.196 0.192 0.188 0.184 0.180 0.177 0.174 0.171 0.168 0.162 0.154 0.148 0.143 0.132 0.124 0.116 0.109 0.098 0.089 0.081 0.071 0.069 0.064 La densidad a presión y temperatura específicas puede convertirse en otra densidad a otra presión y temperatura usando la siguiente ecuación: T1 P2 D2 = D1 T x P 2 1 Donde: T1 = Temperatura en condición inicial ( °F + 460°) T2 = Temperatura en condición nueva ( °F + 460°) D1 = Densidad en lbs/pie3 en condición inicial D2 = Densidad en lbs/pie3 en condición nueva P1 = Presión absoluta (psia) en condición inicial P2 = Presión absoluta (psia) en condición nueva Cálculo de flujo o volumen La misma fórmula puede usarse para convertir el flujo de aire o volumen a la presión indicada (psig) en condiciones estándares (presión atmosférica a 21 °C [70 °F]) sustituyendo pies cúbicos (pies3) o pies cúbicos por minuto (CFM) por densidad (D): I-42 40 50 60 70 80 100 120 150 200 250 300 0.702 0.687 0.672 0.658 0.645 0.632 0.619 0.607 0.596 0.584 0.572 0.561 0.551 0.533 0.508 0.488 0.470 0.436 0.407 0.382 0.360 0.322 0.292 0.267 0.246 0.228 0.212 0.825 0.807 0.790 0.774 0.757 0.742 0.727 0.713 0.700 0.686 0.673 0.660 0.648 0.626 0.596 0.573 0.552 0.513 0.478 0.449 0.423 0.379 0.343 0.328 0.314 0.289 0.268 1.010 0.989 0.968 0.947 0.927 0.908 0.890 0.873 0.856 0.839 0.824 0.809 0.794 0.767 0.730 0.701 0.674 0.627 0.585 0.549 0.517 0.463 0.419 0.383 0.353 0.327 0.304 1.318 1.288 1.260 1.233 1.208 1.184 1.161 1.139 1.116 1.095 1.074 1.054 1.035 1.001 0.953 0.914 0.879 0.817 0.762 0.715 0.674 0.604 0.547 0.500 0.460 0.427 0.397 1.625 1.588 1.553 1.520 1.489 1.460 1.431 1.403 1.376 1.350 1.325 1.300 1.276 1.234 1.175 1.128 1.084 1.007 0.940 0.883 0.831 0.746 0.675 0.616 0.568 0.526 0.490 1.934 1.890 1.850 1.810 1.770 1.730 1.705 1.661 1.638 1.604 1.573 1.546 1.517 1.465 1.392 1.337 1.287 1.197 1.118 1.048 0.987 0.885 0.801 0.733 0.675 0.625 0.582 Densidad (peso) en lbs/pie3 Cálculo de la densidad a otras temperaturas y presiones CFM estándar = CFM real 30 (70 + 460) (T2 +460) x (psig + 14.7) 14.7 psia 1-800-443-2640 0.274 0.268 0.263 0.257 0.252 0.247 0.242 0.237 0.232 0.228 0.224 0.220 0.215 0.208 0.199 0.191 0.184 0.171 0.159 0.150 0.140 0.126 0.114 0.104 0.096 0.089 0.083 0.336 0.328 0.322 0.315 0.307 0.302 0.295 0.291 0.284 0.279 0.274 0.269 0.264 0.255 0.243 0.234 0.225 0.208 0.195 0.184 0.172 0.154 0.140 0.127 0.117 0.109 0.101 0.397 0.388 0.380 0.372 0.365 0.357 0.350 0.343 0.336 0.330 0.324 0.318 0.312 0.302 0.287 0.275 0.266 0.247 0.230 0.216 0.203 0.182 0.165 0.151 0.139 0.129 0.120 0.458 0.448 0.438 0.429 0.421 0.412 0.404 0.396 0.388 0.381 0.374 0.367 0.360 0.348 0.331 0.318 0.305 0.285 0.265 0.249 0.235 0.210 0.190 0.174 0.160 0.148 0.138 0.519 0.508 0.497 0.486 0.477 0.467 0.458 0.449 0.440 0.432 0.423 0.415 0.408 0.394 0.375 0.361 0.347 0.322 0.301 0.282 0.266 0.238 0.216 0.198 0.181 0.168 0.157 0.580 0.567 0.556 0.543 0.533 0.522 0.511 0.501 0.493 0.482 0.473 0.464 0.455 0.440 0.419 0.403 0.388 0.360 0.336 0.316 0.298 0.266 0.241 0.221 0.203 0.188 0.175 Contenido de vapor de agua del aire en libras de agua/100 pies3 a diferentes temperaturas y humedad relativa lbs/100 pies3 a la humedad relativa especificada Aire (°F) 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% -20 .001 -10 .001 0 .001 10 .002 20 .004 30 .006 40 .008 50 .012 60 .017 65 .020 68 .022 70 .023 71 .024 72 .025 73 .025 74 .026 75 .027 78 .030 80 .032 85 .037 90 .043 95 .049 100 .057 .001 .001 .002 .003 .005 .007 .010 .015 .021 .025 .027 .029 .030 .031 .032 .033 .034 .037 .040 .046 .053 .062 .071 .001 .001 .002 .003 .005 .008 .012 .018 .025 .029 .032 .035 .036 .037 .038 .039 .041 .044 .047 .055 .064 .074 .036 .001 .001 .002 .004 .006 .010 .014 .021 .029 .034 .038 .040 .042 .043 .044 .046 .047 .052 .055 .064 .075 .086 .100 .001 .002 .003 .004 .007 .011 .016 .024 .033 .039 .043 .046 .048 .049 .051 .052 .054 .059 .063 .074 .085 .099 .114 .002 .002 .003 .005 .008 .013 .018 .027 .037 .044 .049 .052 .054 .055 .057 .059 .061 .067 .071 .083 .096 .111 .128 .002 .002 .004 .006 .009 .014 .021 .030 .042 .049 .054 .058 .060 .062 .064 .066 .068 .074 .079 .092 .107 .124 .143 .002 .002 .004 .006 .010 .015 .023 .032 .046 .054 .059 .063 .065 .068 .070 .072 .074 .081 .087 .101 .117 .136 .157 .002 .003 .004 .007 .011 .017 .025 .035 .050 .059 .065 .069 .071 .074 .076 .079 .081 .089 .095 .110 .128 .148 .171 .002 .003 .005 .007 .012 .018 .027 .038 .054 .064 .070 .075 .077 .080 .083 .085 .088 .096 .103 .120 .138 .161 .185 .002 .003 .005 .008 .013 .020 .029 .041 .058 .069 .076 .081 .083 .086 .089 .092 .094 .104 .111 .129 .149 .173 .200 .002 .003 .005 .008 .014 .021 .031 .044 .062 .074 .081 .086 .089 .092 .095 .098 .101 .111 .119 .138 .160 .185 .214 .003 .003 .006 .009 .014 .022 .033 .047 .066 .078 .086 .092 .095 .098 .102 .105 .108 .118 .126 .147 .170 .198 .228 .003 .003 .006 .009 .015 .024 .035 .050 .071 .083 .092 .098 .101 .105 .108 .111 .115 .126 .134 .156 .181 .210 .242 .003 .004 .006 .010 .016 .025 .037 .053 .075 .088 .097 .104 .107 .111 .114 .118 .122 .133 .142 .166 .192 .222 .257 Nota: Para convertir los "granos de humedad" a libras, multiplique los granos por 0.0001428. www.chromalox.com .003 .004 .007 .010 .017 .027 .039 .056 .079 .093 .103 .109 .113 .117 .121 .124 .128 .141 .150 .175 .202 .225 .271 .003 .004 .007 .011 .018 .028 .041 .059 .083 .098 .108 .115 .119 .123 .127 .131 .135 .148 .158 .184 .213 .247 .285